Electric lamp



W. A. HARVEY.

ELECTRIC LAMP.

APPLxcATloN FILED APR.19..1915.

Patented Aug. 8, 1916.

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A, Harvey,

W. A. HARVEY.

ELECTRIC LAMP. v

APPLICATION FILED APR.19,1915.

1,193,894. PatentedAug. 8,1916.

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STATES ,PATENT FFllCE.

WILLIAM A. HARVEY, OF SCRANTON, PENNSYLVANIA.

ELECTRIC LAMP.

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To all whom it may concern:

Be it known that l, WILLIAM A. HARVEY,

a citizen of the United States, residing at Scranton, in the county ofLackawanna and State of Pennsylvania, have invented certain new anduseful Improvements in Electric Lamps, of which the following is aspecification.

This invention, while adapted for embodiment in electric lamps forgeneral uses, is particularly appropriate for small reading lampsdesigned to illuminate a comparatively restricted area, such as thesurface of a book, or illuminating a comparatively larger area where abrilliant light is not required.

The invention has fo-r its object to provide a lamp structure that willbe simple and cheap to make and assemble, and to these ends, theinvention consists in novel features of construction hereinafter fullydescribed and particularly pointed out in the claims, reference beinghad to the accompanying drawings, in which- Figure 1 is a perspective.view illustrating one use for which the lam is peculiarly adapted. Fig.2 is an elevation of the lamp in the same relation asdshown in Fig. l,and with the lamp proper in section to disclose the internalconstruction. Fig. 3 is a sectional view of a lamp of somewhat modifiedconstruction. Fig. 1 is a view similar to Fig. 3, showing a furthermodication of the internal construction of the lamp. Fig. 5 is anelevation showing another method -of hanging the lamp. Fig. 6 is adetail view o f a book clamp with which the lamp is preferably provided.Fig. 7 is a detail view of parts shown in Fig. 6, but viewed indirections at right angles to Fig. 6. Fig. 8 is a schematic view,suggesting Athe use of the lamp with current derived through the mediumof an induction device, which adapts it to be `introduced in anvordinary houselighting system,` and Fig. 9 is a detail view of theelectrical fittings incident to mounting the lamp upon its supportlwithin the housing.

The lamp is preferably constructed of a housing 1,v a coupling 2 and ahanger 3, which latter is preferably adapted to be supported'by an arm4, which forms a conduit forthe lamp circuit wires 5, and which is inturn supported on the bracket 6.

The interior construction of the lamp em- Specication of Letters Patent.

Patented aug. s, raie.

Application filed April 19, 1915. Serial No. 22,462.

bodies anattaching shank 7 threaded into the coupling 2 and carrying ashoulder bar 8, which is adapted to seat against the annular shoulder 9on the housing l, whoserupper end seats against the coupling 2, so thatwhen'the shank 7 is screwed into the coupling 2, the shell is heldfirmly on the latter and steadied in position by the bar 8. rllheessential characteristics of the parts 7 and 8 are to provide a means ofattachment to the 65 coupling 2 and to provide an enlargement that willengage the shellV and firmly clamp it against said coupling.

Spaced from the bar 8, is an insulation bar l0 connected thereto throughbolts 11 7o and with intervening spacing members 12 g' the spacingmembers in the form shown in Fig. 2 being insulated sleeves around thebolts, and said bolts extending through both bars. Secured to the bar10, is the socket 13 75 adapted to receive the lamp bulb; said socketbeing constructed with the usual conductive threaded lining forming oneterminal .of the electric circuit, and a central button forming theother terminal so as to complete the circuit through the electric bulbwhen screwed into place.

14 represents a ,reflector which is seated at l5 upon the shell (in theconstruction of Fig. 2, upon the lower edge of the shell), and thisreflector is seated upon the socket 13, which provides a shouldertherefor in such manner that when the shank 7 is screwed into thecoupling 2, and the bar 8 which in effect forms a shoulder on said shankis seated against the shoulder 9, the

`reflector will be drawn against its seat 15,

pling, the Jinterior fittings ofthe lamp may be removed from the housingand exposed to view. Y

. The coupling 2. fits the nipple 16 on the hanger 3, or isotherwise.suitably-connected 100 to the hanger. s

To fix the reflector 14: relatively to the socket 13, independently ofthe bearing of the reflector upon the seat 15, the screws 17 l. whichpass through the insulated bar 10are 105 made to impinge upon a clampingdisk 18, which rests upon the apex of the reiiector p immediately overthe shoulder provided by the socket 13, and this socket'13'is preferablymade in the `form of an insulated sleeve,

the thread for receiving the lamp being provided by a threaded thlmble19, whose closed upper end receives the button that provides ing theinsulating sleeve- 13 from the threaded thimble 19 of the socket andtaking ofi' the reflector and the clamping disk with it. l

According to Fig. 3, the housing is in the form of'a bell-shaped domela, but the parts are constructed similarly to those of Fig. 2, exceptthat the refiector is of conical shape,

as shown at 14a (Fig. 3), instead of spheroidal, as in Fig. 2,` and theclamping disk 18 which holds the apex of the reflector upon the sleeve13, abuts'directly against the ci'rcuit plate 22. The reflector,however, still has its bearing against the housing, which .in thisinstance is 'provided by the seat 15a.

According to Fig. 4, which shows a somewhat modified design of bell domeor casing 1", the shoulder'afforded by-the bar 8 in Figs. 2 and 3 nowbecomes a nut 8, which seats against the casing, but immediatelyopposite the bearing which the casing has against the coupling 2, thecasing being thereby clamped in position and the interior mountingsbeing held within the casing; -also the spacing members for the bar l0anow be-V come a pair of metal legs 12a which are united to the bar 10aby short screws 11'. The lamp socket 13 and the parts immediatelyassociated ytherewith correspond to those of Fig.v 3, the'reliectorbeing in the form of a cone and finding its seat upon the casing at 15a,just as in Fig. 3.v

If desired, the hanger 3 which supports the llamp fitting upon thebracket 4, may give place to a hanger 3, as in Fig. 5, which is .adaptedto be received by the bracket 4a where -it is desired to locate the lampwith- 'out particular regard to the brightness of the illumination, orlocalizing 1t upon an object such as a book. This hanger 3a or ring isconnected with the casing 1b by means of the coupling pendant 2a,which'is functionally identical with the coupling 2, so far as concernsthe housing and the parts within it. l

The clamp 6 is of known construction, so far as concerns its clampingjaws, the means for drawing them together upon a thin object, such as abook cover, and the means for angularly adjusting the arm 4; butaccording to the present invention, an alining yoke 6a is mounted uponthe upper jaw and made to extend considerably on either side thereof,and thence downwardly to form an abutment for the straight edge of theobject toA whose primary w1nding`23b is in the cord or other circuit 24,.which includes the plug 24a adapted to enter a lamp socket in anyexisting system using alternating current. The inductance 23 ishsuchthat it will stepdown the current to a voltage safely within thecapacity of the lamp ,and its fittings, and thus make it'practicable touse a very small lamp for' the sake of economy in current consumption,as well as cost of equipment, and convenience in mounting and supportingthe lamp in position to localize its `radiation. But ordinarily the lampcircuit 5 will be connected to a portable battery of suitable capacity.I have found in practice that a battery of several dry cells, such ascan be readily purchased in open market, will'give results that aresatisfactory b'oth as to illumination and economy of consumption whenused in connection with the lamp herein described.

1. In a lamp, the combination of a housing, a' reflector seating against`said housing,

a socket member protruding through said-v reflector and lhaving ashoulder through which it engages the refiector in the direc-- tion tohold it against its seat upon .the housing, a supporting bar carryingthe socket member in position to clamp the reflector between theshoulder and said supporting bar, and means for holding the bar withinthe housing with the reiector seated against the housing. v

2. In a lamp, the combination of a hous-vv ing, a reflector seatingagainst said vhousing,

a socket member protruding' through said reflector and having a shoulderthrough which it engages the reflector in thedirection to hold itagainst its seat upon the housing, a supporting bar carrying the sockety member in position to clamp the reflector between the shoulder andsaid vsupporting bar, and means for holding the`ba-r withinthe housingwith the reflector seated against the housing, comprising a shankconnected with the 'supporting bar, and a couplingv member outside thehousing, receiving the shank; the housing being drawn v"against saidcoupling through means of said shank.-

3. In a lamp, the combinationA of a housing, a socket member adapted toreceive a shoulder thereon, a reflector seated against suitableilluminating device and havin a' the housing and also against saidshoulder, means for drawing. the socket endvvise into the housing, andthereby fixing the reflector in position; said means comprising a barWith which the socket member is connected,

and the housing being provided With a seat i against which the bar restswhen the reflector is seated, a shank projecting from said bar, in thedirection to draw the bar and reflector to their seats, and a couplingoutside the housing, receiving and holding the shank, and seated againstthe housing when the bar and reflector are seated.

4. In a lamp, the combination of a coupling, a housing seated againstsaid coupling, an attaching shank fitted to said coupling and providedWith a shoulder-forming member through which it is seated aga-inst thehousing, and adapted to draw the housing to its seat against thecoupling, a reflector seated against the housing, and ha socket memberseated against the reflector and connected with the shank and held bythe shank in position to hold the reflector to its seat upon thehousing. v

5. In a lamp, the combination of a coupling, a housing seated againstsaid coupling, an attaching shank fitted to said coua pling and providedWith a shoulder-forming member through which it is seated against thehousing, and adapted to draw the housing to its seat against thecoupling, a reflector seated against the housing, and a socket memberseated-against the reflector and connected 'With the shank and held bythe shank in position to hold the reflector to its seat upon thehousing; said shank being adjustable in the coupling for tightening itsseating agai-nst`the housing and theseating of the housing against thecoupling.

.6. In a lamp, the combination of a coupling, a housing'seated againstsaid coumember through which it is seated against the housing, andadapted to draw the housv ing to its seat against the coupling, areflector seated against the housing, and a socket member seated againstthe reflector and` connected with the shank and held by the shank inposition to hold the reflector to its Aseat upon the housing; saidsocket member being adjustable relatively to the shank for tighteningits seating against the relector and. the seating of the reflector ,jagainst the housing.

7. In alamp, the combination of a cou- A pling, a vhousing seatedagainst said coupling, anattaching shank fittedto said coupling andprovided with a shoulder-forming member through which it is seatedagainst the housing, and adapted to draw-the housing to its seat againstthe coupling, a re-v flector seated against the housing, and asocketmember seated against the reflector and connected with the shankand held by the, shank in position to hold the reflector to its seatupon the housing; said shank being adjustable in the coupling fortightening its seating against the housing and the seating of Ithehousing -against the coupling; said socket member being adjustablerelatively to the shank for tightening its seating against the reflectorand the seating of the reectdr against the housing.

8. In a lamp, the combination of a couplinga housing seated against saidcoupling, an attaching shank fitted to said coupling and provided with ashoulder-forming member through which it is seated against the housing,and adapted to draw the housing to its seat against the coupling, aninsulating support mounted on the shoulderforming member of the shankand suitably spaced therefrom, a reflector seated against the housing,and a socket member seated against the reflector and connected-"With theshank, through the medium of said insulating support, and held by theshank in position to hold the reflector to its seat upon the housing.

9. In a lamp, the combination of a housing, a support Within saidhousing, an insulating mounting carried by said support, a lamp socketcarried by saidmounting, av shoulder-forming member carried by andaxially adjustable upon said socket, a reflector against which saidshoulder-forming member seats, a clamping disk sustained by theinsulating mounting and sustaining the reflector against said shoulderforming member, and a seat for the reflector on the housing. y

l0. In a lamp, the combination of a housing, a support Within saidhousing, an insulating mounting carried by said support,

la lamp socket carried by saidmountmg, a

member seats, a clamping disk sustained by.

the insulating mounting and sustaining the reflector against saidshoulder forming member, and a seat for the reflector on the housing;said mounting member having means for drawing it axially into thehousing and thereby drawing the reflector to its seat upon the housing.

l1. In a lamp, the combination of a housing, a support Within saidhousing, an insulating mounting carried by said support, a lamp socketcarried by said mounting, av shoulder-forming member carried by andaxially adjustable upon said socket, a reflector against Which saidshoulder-forming member seats, a clamping disk lying against saidreflector, screwsmounted in and protruding beyond the insulating member,providing means through Which the clamping disk is sustained by theinsulating mounting v 5 ing, fittings within said housing, an attach.-

ing shank connected with" said ttings and l'seated against the housing,a coupling re-` ceiving aid shank and providing a seating -forthe-Vousing and against which the hous- 10 ing ishe ldrby the seatupon theshank, a

hanger receiving said coupling, and means I' for supporting. saidhanger.

` 13'. Ina lamp, the combination of a housing, fittings Within saidhousing, an attach- 15 ing shank connectedl with said fittings andseated againstthe housing, a coupling receiving said shank and providinga. seating foi-'the housing and against which `the housingis held by theseat upon the shank, a

whanger receiving sla-idl coupling, and means `for supporting saidhanger,`q'compr1sing a bracket arm, and means for supporting saidbracket arm. I

14, I ni a,.1amp, the combination f a Su'p 25 ,porting bar '.havlng a.connecting member i -projeting rearwardlytherefrom, an insu; v

ating barl mounted upon and spaced from said supporting bar, a lampsocket secured to saiddnsulatmg bar, a reflector through sofwhichj saidlamp socket protrudes having aA which said lamp socket protrudes havin aiange projecting towardthe lamp socket and in abutment with theinsulating bar, and a clampingnut surrounding the lamp socket andgripping the reiiector H ange against the insulating bar.-

15. In a lamp, the'combination of a supyporting bar having a connectingmember projecting rearwardly therefrom, an insulating bar mounted uponand 'spaced'from said supportingbar, a lamp socket secured tosaidinsulatlng bar, a reflector through iange projecting toward the lamp socet and in abutment with the insulating bar,

anda clamping nut 'surrounding the lamp socket and gripping thereflector flange against. the insulatingv bar; said insulating s v barhaving suitable conducting contacts in position to connect with the lampsocket .and with a lamp introduced therein, and

having a raised insulating portion through which it coacts with the nutin clamping the reflector.

The foregoing specification signed at Scranton, Pennsylvania, thistwentyninth day of March, 1915. .v v

-WILLIAM A, HARVEY. In presence 4of two Witnesses-|- JAMESy vMoni,

P. S. BROWNING.

